J. Nannoplankton Res. 28 (2), 2006, pp.111-113 © 2006 International Nannoplankton Association
ISSN 1210-8049 Printed by Cambridge University Press, UK111

Taxonomic note: New calcareous nannofossil taxa from Shatsky Rise
(ODP Leg 198, NW Pacific Ocean)Paul R. Bown, Jackie A. Lees*
Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, UK; *j.lees@ucl.ac.uk
Manuscript received 24th August, 2006; revised manuscript accepted xxth August, 2006

1. Introduction
Last year, a total of 23 new calcareous nannofossil taxa
were discovered at Shatsky Rise (Ocean Drilling Program
Leg 198, NW Pacific; Figure 1). One new genus,Mattiolia, and 13 new species (Gartnerago ponticula,Haqius peltatus, Helicolithus leckiei, Kokia stellata,
Mattiolia furva, Rhagodiscus adinfinitus, R. amplus, R.
robustus, R. sageri, Tubodiscus bellii, T. frankiae,
Zeugrhabdotus clarus and Z. petrizzoae) were describedfrom the tropical Early Cretaceous by Bown (2005a) andBown & Hampton (in Bown, 2005a). In addition,
Assipetra terebrodentarius youngii and Haqius ellipticus
were emended. Lees & Bown (2005) described seven new
species from the tropical to subtropical Late Cretaceous:
Ahmuellerella alboradiata, Ceratolithoides perangustus,
C. sagittatus, Micula clypeata, M. premolisilvae,
Tegumentum lucidum and Uniplanarius clarkei. They also
recombined three taxa: Cribrocorona (Cylindralithus)
echinus, Loxolithus (Crepidolithus) thiersteinii andRotelapillus (Cylindralithus) biarcus. Finally, from the
Palaeogene, Bown (2005b) described Sphenolithus
arthurii and Fasciculithus fenestrellatus.
Here, in summary form (Plates 1, 2), we reproduce theoriginal holotype illustrations of these new taxa, alongwith some of the newly combined and emended species
and some taxa that are rarely recorded, or that are usefulfor comparison. All of the original articles, containing 35
plates of light microscope illustrations in total, are freely
available online (see references for web-addresses). Agesfor the samples in the plates are provided in the Appendix.
References
Bown, P.R. 2005a. Early to Mid-Cretaceous Calcareous
Nannoplankton from the Northwest Pacific Ocean, Leg 198,
Shatsky Rise. In: T.J. Bralower, I. Premoli Silva & M.J.
Malone (Eds). Proc. ODP, Sci. Results, 198: 1-82. Available
online at www-odp.tamu.edu/publications/198_SR/VOLUME/CHAPTERS/103.PDF
Bown, P.R. 2005b. Cenozoic Calcareous Nannofossil
Biostratigraphy, ODP Leg 198 Site 1208 (Shatsky Rise,Northwest Pacific Ocean). In: T.J. Bralower, I. Premoli Silva& M.J. Malone (Eds). Proc. ODP, Sci. Results, 198: 1-44.
Available online at www-odp.tamu.edu/publications/
198_SR/VOLUME/CHAPTERS/104.PDF
Lees, J.A. & Bown, P.R. 2005. Upper Cretaceous CalcareousNannofossil Biostratigraphy, ODP Leg 198 (Shatsky Rise,Northwest Pacific Ocean). In: T.J. Bralower, I. Premoli Silva& M.J. Malone (Eds). Proc. ODP, Sci. Results, 198: 1-60.
Available online at www-odp.tamu.edu/publications/
198_SR/VOLUME/CHAPTERS/114.PDF

Figure 1: Bathymetry and location of Shatsky Rise and ODP Leg 198
sites, NW Pacific Ocean. After Lees & Bown (2005)

Appendix198-1207B-6R-CC - Early Campanian, UC14dTP-15aTP
198-1207B-20R-CC - Middle/Upper Cenomanian, UC3/4
198-1207B-28R-CC - Late Albian, NC10a
198-1207B-29R-CC - Late Albian, NC9b198-1207B-39R-CC - Aptian, NC7198-1207B-42R-CC - Aptian, NC7198-1208A-36X-2, 99cm - Early Eocene, CP9198-1208A-36X-CC, 1.5cm - Early Eocene, CP9b198-1208A-36X-CC, 12cm - Late Palaeocene, CP8198-1208A-41H-1, 10cm - Early Campanian, UC15bTP
198-1208A-42X-CC - Albian, NC8c/9a198-1209C-16H-6, 50cm - Late Maastrichtian, UC20bTP
198-1209C-18H-7, 50cm - Late Maastrichtian, UC20bTP
198-1210B-26H-CC - Late Maastrichtian, UC20aTP
198-1210B-30H-5, 120cm - Late Campanian/Early Maastrichtian,UC17198-1210B-30H-CC - Late Campanian/Early Maastrichtian, UC17198-1210B-34H-5, 45cm - Late Campanian, UC16198-1210B-34H-CC - Late Campanian, UC16198-1210B-36H-7, 60cm - Late Campanian, UC16198-1210B-38H-CC - Late Campanian, UC15dTP-15eTP
198-1210B-41H-CC - Early Campanian, UC15bTP
198-1213A-12R-CC - Early Cenomanian, UC1198-1213A-20R-CC - Late Albian, NC8c-9198-1213B-4R-1, 48cm - Early Albian, NC8a/b198-1213B-20R-1, 31cm - Berriasian, NK2a198-1213B-23R-1, 20cm - Berriasian, NK2a198-1213B-25R-1, 26cm - Berriasian, NK2a198-1213B-26R-1, 15cm - Berriasian, NK2a198-1213B-27R-1, 1cm - Berriasian, NK1198-1213B-27R-1, 38cm - Berriasian, NK1198-1214A-19R-1, 37cm - Early Albian, NC8a/b

Bown, Lees112

Plate 12µmholotypeholotype

2

1

4

3

Ahmuellerella alboradiata 1209C-16H-6, 50

5Ceratolithoides perangustus 1210B-36H-7, 60

holotype

768910Cer. sagittatus 1210B-38H-CC Cer. sagittatus 1210B-38H-CC Cribrocorona echinus 1210B-30H-5, 120Crib. echinus 1210B-30H-CCparatypeholotype

1112

Gartnerago ponticula 1207B-20R-CC
holotype

1617

Haqius peltatus 1213B-27R-1, 1
holotype2122

Kokia stellata 1213B-27R-1, 38
holotype

2627

Micula clypeata 1209C-18H-7, 50
holotype

3132

Uniplanarius clarkei 1210B-34H-5, 45

131415

Haqius ellipticus 1213B-25R-1, 26
holotype

18Haq. peltatus 1213B-26R-1, 15

1920

Helicolithus leckiei 1207B-28R-CC
holotype

23

Loxo. thiersteinii 1208A-41H-1, 10
paratype

2425

Mattiolia furva 1208A-42X-CC

Mattiolia furva 1208A-42X-CC
holotype

282930M. praemurus 1210B-26H-CC Micula premolisilvae 1210B-34H-CC

33

3435
Quadrum svabenickae 1210B-41H-CC

Taxonomic note: New calcareous nannofossil taxa from Shatsky Rise113

Plate 22µmholotype

holotype

21

Rhagodiscus adinfinitus 1213B-25R-1, 26holotype

6734holotype

8

Rhagodiscus robustus 1214A-19R-1, 37

9holotype1213

Rhagodiscus sageri 1207B-39R-CC
holotype

16

17

22

1418

19

20

Tubodiscus burnettiae 1213A-12R-CC
holotype

23

Watz. cynthae 1213B-20R-1, 31 Watznaueria bayackii? 1213A-20R-CC2425

Zeugrhabdotus petrizzoae 1213B-4R-1, 48

holotype

2615

Tubodiscus bellii 1213B-20R-1, 31

Tubodiscus frankiae 1213B-23R-1, 20

21

10

Tegumentum lucidum 1207B-6R-CC

holotype

115Rhagodiscus amplus 1207B-42R-CC

holotype

2728

Zeugrhabdotus clarus 1207B-29R-CC

2930

Sphenolithus arthurii 1208A-36X-CC, 1.5
holotype

3132

Sphenolithus villae 1208A-36X-2, 99

333435

Fasciculithus fenestrellatus 1208A-36X-CC, 12